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6502 Single Board Computer (SBC) Design

Eagle CAD: v1.0 Schematic

 

Eagle CAD: v1.0 PCB Layout

 

Printed Circuit Board

 

2004A 4x20 LCD Display

 

Bill of Materials BOM

 

Overview

This initial design uses 32KB for ROM and 32KB for RAM at locations $0000 and $8000, respectively.

 

The 20x4 LCD is driven by a VIA (versatile interface adaptor) with 512B for data/control starting at $7FE0.

 

Power to the SBC is via a 5v miniUSB connector or a 5v diode-protected connector.

 

Communication with the 6502 SBC is via terminal software and the W65C51N ACIA UART.

 

 

 

Modern CMOS Parts Used:

 - CPU: W65C02S

 - VIA: W65C22

 - ACIA (UART): W65C51N

 - ROM: SST39SF040

 - RAM: AS6C4008

 

 - LCD: 2004A

 - MONITOR: FN ATMega2560

 

CPU                                               VIA                                            ACIA

ROM: SST39SF040                   RAM: AS6C4008

 

 

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